WO2013145823A1 - ワイヤロープ検査装置 - Google Patents

ワイヤロープ検査装置 Download PDF

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Publication number
WO2013145823A1
WO2013145823A1 PCT/JP2013/051324 JP2013051324W WO2013145823A1 WO 2013145823 A1 WO2013145823 A1 WO 2013145823A1 JP 2013051324 W JP2013051324 W JP 2013051324W WO 2013145823 A1 WO2013145823 A1 WO 2013145823A1
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WO
WIPO (PCT)
Prior art keywords
wire rope
camera
light source
video
state analysis
Prior art date
Application number
PCT/JP2013/051324
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
清高 渡邊
敬太 望月
敬秀 平井
関　真規人
鹿井　正博
隆史 平位
研二 芹澤
哲明 福世
Original Assignee
三菱電機株式会社
三菱電機ビルテクノサービス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社, 三菱電機ビルテクノサービス株式会社 filed Critical 三菱電機株式会社
Priority to KR1020147025511A priority Critical patent/KR20140123593A/ko
Priority to JP2014507466A priority patent/JP5769875B2/ja
Priority to CN201380013930.4A priority patent/CN104185786B/zh
Publication of WO2013145823A1 publication Critical patent/WO2013145823A1/ja

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G01B11/10—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving
    • G01B11/105—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving using photoelectric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/2433—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring outlines by shadow casting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection

Definitions

  • the present invention relates to a wire rope inspection apparatus.
  • a light projecting unit for irradiating a laser beam and a light receiving unit for receiving light that has passed through the wire rope are respectively arranged at positions facing each other with the wire rope interposed therebetween.
  • An inspection device that travels and measures the diameter of the entire length of the wire rope has been proposed (for example, Patent Document 1).
  • Patent Document 2 in an inspection apparatus using a method of irradiating a wire rope with light and capturing the reflected light with a camera, an operator can confirm a video recorded by imaging.
  • the measurement accuracy may be lowered. That is, for example, when the surface of the wire rope is soiled with oil or the like, or when the wire rope has a metallic luster, the light reflected from the wire rope is uneven or uneven. As a result, there is a problem that it is difficult to accurately extract only the portion where the rope is reflected from the captured image.
  • the fact that the wire rope has a cylindrical shape and that shadows are generated by the strands and strands constituting the wire rope also make it difficult to extract the wire rope outline. Furthermore, when an object is present at a position facing the camera across the wire rope, or when external light is present in the measurement environment, there is a problem that the accuracy of extracting the outline of the wire rope is reduced.
  • the present invention has been made to solve such problems, and an object of the present invention is to provide a wire rope inspection apparatus capable of inspecting a wire rope with higher accuracy than in the past.
  • the present invention is configured as follows. That is, the wire rope inspection device according to one aspect of the present invention is arranged so as to face a camera that continuously captures a moving wire rope as an image and the camera with the wire rope interposed therebetween. A surface light source that emits light, a state analysis device that analyzes the state of the wire rope from the wire rope image captured by the camera, and an analysis result display that displays the analysis result analyzed by the state analysis device And a device.
  • the camera captures a shadow formed by the light irradiated from the surface light source being blocked by the wire rope. Even when there is a metal reflection or the like, the wire rope region can be stably extracted from the image of the wire rope. Therefore, the wire rope can be analyzed with higher accuracy than in the past.
  • FIG. 1 It is a block diagram of the wire rope inspection apparatus by Embodiment 1 of this invention. It is a perspective view of the wire rope inspection apparatus which shows the positional relationship of the wire rope with which the wire rope inspection apparatus shown in FIG. 1 is equipped, a camera, and a surface light source. It is the schematic diagram which showed an example of the image
  • FIG. 2 is a schematic diagram showing an example in which a state analysis device and an analysis result display device provided in the wire rope inspection device shown in FIG. 1 are configured by a general-purpose computer, and an analysis result is displayed by a program operating on the computer.
  • It is a block diagram of the wire rope inspection apparatus by Embodiment 3 of this invention. It is the schematic diagram which showed an example of the image
  • FIG. 8 is a schematic diagram showing an example in which the state analysis device and the analysis result display device provided in the wire rope inspection device shown in FIG.
  • FIG. 7 are configured by a general-purpose computer, and the analysis result is displayed by a program operating on the computer.
  • FIG. 16 is a schematic diagram illustrating an example in which the state analysis device and the analysis result display device included in the wire rope inspection device illustrated in FIG. 15 are configured by a general-purpose computer, and the analysis result is displayed by a program operating on the computer.
  • FIG. 6 is a block diagram for explaining functions of a state analysis device provided in the wire rope inspection device according to the first to fourth embodiments of the present invention.
  • wire rope inspection apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
  • the same or similar components are denoted by the same reference numerals.
  • the wire rope inspection apparatus of each following embodiment although the wire rope in an elevator is taken as an example as an example of a wire rope, of course, it is not limited to this.
  • FIG. 1 shows a configuration of a wire rope inspection apparatus 101 according to the first embodiment.
  • the wire rope inspection device 101 includes a camera 120, a surface light source 130, a state analysis device 150, and an analysis result display device 160 as basic components.
  • the configuration illustrated in FIG. 1 further includes a video recording device 140, a diffusion plate 135, and a louver 170. These components will be described below.
  • FIG. 2 is a view showing the positional relationship between the wire rope 1, the camera 120, and the surface light source 130 provided in the wire rope inspection apparatus 101.
  • the camera 120 and the surface light source 130 are provided at positions facing each other with the wire rope 1 to be inspected in between, and the surface light source 130 irradiates the wire rope 1 and the camera 120 with light. Therefore, when viewed from the camera 120 side, the surface light source 130 is located on the back side of the wire rope 1. With this arrangement, the camera 120 shoots the video while running the wire rope 1.
  • the video data of the wire rope 1 photographed by the camera 120 is stored in the video recording device 140.
  • the state analysis device 150 reads the video data recorded in the video recording device 140, analyzes the captured video of the wire rope 1, and analyzes the state of the wire rope 1 including the quality of the wire rope 1 as a result thereof. 160.
  • the state of the wire rope 1 refers to, for example, the outer diameter of the wire rope 1, the presence or absence of rust on the surface of the wire rope 1, the presence or absence of a broken wire of the wire rope 1.
  • the state analyzed by the state analyzer 150 is not limited to these physical quantities and physical phenomena, but includes general physical quantities and physical phenomena related to the strength and aging of the wire rope. These components will be described in more detail below.
  • the camera 120 is in such a posture that the horizontal line in the image sensor is perpendicular to the longitudinal direction of the wire rope 1 and at an angle of view that includes the wire rope 1 and the surface light source 130 provided behind it in the field of view. Be placed. By arranging in this manner, the camera 120 simultaneously captures the shadow formed by the light irradiated from the surface light source 130 being blocked by the wire rope 1 and the light directly incident on the camera 120 from the surface light source 130. It becomes.
  • a diffusion plate 135 is further arranged between the wire rope 1 and the surface light source 130 so that the light emitted from the surface light source 130 passes through the diffusion plate 135 and is applied to the wire rope 1 and the camera 120. Also good. Further, a louver 170 may be further disposed between the wire rope 1 and the diffusion plate 135 so that light emitted from the surface light source 130 passes through the louver 170 and is irradiated to the wire rope 1 and the camera 120. .
  • the louver 170 is a filter for controlling the traveling direction of light, and is arranged so as to be orthogonal to the optical axis of the camera 120.
  • the diffusing plate 135 and the louver 170 are preferably used at the same time, but may be configured to include only one of them.
  • FIG. 3 is a schematic diagram illustrating an example of an image captured by the camera 120. Since light is irradiated from the surface light source 130 toward the wire rope 1 and the camera 120, the area 1A that is blocked by the wire rope 1 and becomes a shadow appears dark as shown in the center portion of FIG. On the other hand, the portion 130A where the light from the surface light source 130 directly enters the camera 120 appears bright as the left and right portions of FIG. 3 is a conceptual diagram when an area camera is used as the camera 120, the wire rope inspection apparatus 101 is not limited to an area camera but may be a line camera.
  • FIG. 3 is a diagram when one camera 120 captures an image of one wire rope 1.
  • the cameras are arranged so that a plurality of wire ropes 1 are within one field of view. 120 may be arranged, the state analysis device 150 may simultaneously analyze the plurality of wire ropes 1, and the results may be simultaneously displayed on the analysis result display device 160.
  • the video recording device 140 is a device that records video data of the traveling wire rope 1 photographed by the camera 120.
  • a video recording device 140 may be built in either the camera 120 or the state analysis device 150, or may be removable from the camera 120 and the state analysis device 150. Good.
  • the form connected with the camera 120 and the state analysis apparatus 150 with a cable may be sufficient.
  • a recording medium such as a hard disk, a non-volatile memory, an optical disk, or a video tape can be used as the video recording device 140.
  • the state analysis device 150 sequentially reads the captured video data of the wire rope 1 recorded in the video recording device 140 for each frame, and performs an analysis process of the state of the wire rope 1. The result of the analysis process is displayed on the analysis result display device 160.
  • the state analysis device 150 is actually implemented using a computer, and will be described in detail in the state analysis operation description part of the wire rope 1 described below.
  • Software programs corresponding to each analysis function and the execution thereof are executed. It is composed of hardware such as a CPU (Central Processing Unit) and a memory.
  • the computer preferably corresponds to a microcomputer incorporated in the wire rope inspection apparatus 101, but a stand-alone personal computer can also be used.
  • the analysis result display device 160 is configured by the same computer as the state analysis device 150, for example, and a display of this computer can be used. Of course, a separate display may be used.
  • the video recording device 140 may be omitted from the configuration shown in FIG. 1 when it is not necessary to record video from the camera 120 or to reproduce the recorded video later.
  • the camera 120 is directly connected to the state analysis device 150, and the state analysis device 150 sequentially analyzes video signals transmitted from the camera 120 in real time.
  • the state analysis device 150 includes a rope region extraction unit 151, a display region extraction unit 152, a travel distance information recognition unit 153, a travel distance, as shown in FIG.
  • Each component includes a distance information output unit 154, a rope diameter acquisition unit 155, a rust detection unit 156, and a strand break detection unit 157.
  • Such a state analysis device 150 is actually realized by using a computer as described above, and each of the components 151 to 157 includes software (program) corresponding to each function and It is comprised from hardware, such as CPU and memory for performing.
  • the program includes not only a program that can be directly executed by a computer but also a program that can be executed by being read via a communication line and installed in a hard disk or the like. Also included are those that are compressed or encrypted.
  • the state analysis device 150 reads the image data captured and recorded by the camera 120 from the video recording device 140 (step S11), and sequentially executes the following processing for each frame of the image data.
  • the state analysis device 150 uses the rope region extraction unit 151 to capture a portion 130A (FIG. 3) in which the surface light source 130 is captured of one frame of imaging data based on the optical characteristics of the surface light source 130, and a wire. It isolate
  • the optical characteristics refer to characteristic values such as the color (wavelength characteristics) of emitted light from the surface light source 130 and its intensity (luminance), for example.
  • step S12 The operation of extracting the region 1A of the wire rope 1 in step S12 will be described in more detail.
  • an example of processing for extracting the region 1A of the wire rope 1 based on the intensity (luminance) of light is shown.
  • the rope region extraction unit 151 of the state analysis device 150 creates a luminance histogram as shown in FIG. In the created histogram, two large peaks are generated. In FIG. 5, the peak that appears in the dark portion corresponds to the portion that appears dark due to the shadow of the wire rope 1, and the peak that appears in the bright portion corresponds to the portion that appears bright due to the light emitted from the surface light source 130. Each corresponds.
  • the rope region extraction unit 151 uses this histogram to calculate a threshold value for distinguishing between the region 1A of the wire rope 1 and the region 130A of the surface light source 130.
  • the threshold calculation method for example, a discriminant analysis method, a mode method, or the like can be used. Then, a pixel whose luminance is higher than the obtained threshold is identified as the region 130A of the surface light source 130, and a small pixel is identified as the region 1A of the wire rope 1.
  • the procedure for generating a histogram from the video and automatically determining the threshold value is exemplified, but a predetermined fixed value may be used as the threshold value.
  • the state analysis device 150 measures the width of the extracted region 1A of the wire rope 1 at the rope diameter acquisition unit 155 (step S13).
  • the unit for obtaining the width of the region 1A on the image is the number of pixels. Therefore, a conversion coefficient (actual dimension per pixel) between the number of pixels and the actual dimension of the rope 1 is set in the rope diameter acquisition unit 155.
  • the rope diameter acquisition part 155 calculates the actual dimension of the diameter of the wire rope 1 from the extracted pixel count of the width
  • the method of obtaining the actual dimension of the wire rope 1 from the number of pixels is not limited to the method using the conversion coefficient described above, and other known methods can be adopted, for example, using a table. .
  • the actual dimension of the acquired diameter of the wire rope 1 is output as data (step S14).
  • the output form display on a screen, storage in a file format, printing to a printer, and the like are possible.
  • the diameter can be measured over the entire length of the wire rope 1 and the result can be obtained.
  • the analysis result display device 160 is actually implemented using a computer as described above, and software (programs) corresponding to the following functions and a CPU (central processing unit) for executing the software (program). And hardware such as memory.
  • functions of the analysis result display device 160 include a recorded video display unit 161, a video file designation unit 162, a conversion coefficient input unit 163, a wire rope diameter measurement result display unit 164, a wire rope diameter graph display unit 165, and an operation unit 166.
  • a travel distance display unit 167 (Embodiment 4) and a rust ratio display unit 168 (Embodiment 4) are provided.
  • FIG. 6 shows that the functions of both the state analysis device 150 and the analysis result display device 160 are configured by a single general-purpose computer, the wire rope 1 is analyzed by a software program on this computer, and the results are displayed. An example is shown. Prior to performing the analysis process, the above-described conversion coefficient between the number of pixels and the actual size is input in advance to the conversion coefficient input unit 163 in the display (analysis result display device 160).
  • the video file designation unit 162 designates a video file recorded in the video recording device 140 to be analyzed. Due to this designation, the video file designation unit 162 actually reads the designated video file from the video recording device 140. The video of the read video file is reproduced and displayed by the recorded video display unit 161. Further, the wire rope diameter is measured from the read video file according to the procedure described above. The measurement result is displayed as a line graph by the wire rope diameter graph display unit 165. Further, when the operator operates the operation unit 166, the video displayed on the recorded video display unit 161 can be reproduced, paused, fast-forwarded, or rewound.
  • the current position display 165d in the wire rope diameter graph display unit 165 moves left and right.
  • the wire rope diameter graph display unit 165 also has a function as a synchronous display unit. Further, the measurement result of the corresponding wire rope diameter is synchronously displayed by the wire rope diameter measurement result display unit 164.
  • the camera 120 captures a shadow formed by the light irradiated from the surface light source 130 being blocked by the wire rope 1.
  • 101 can stably extract the region 1A of the wire rope 1 from the image even if the surface of the wire rope 1 has, for example, oil stains or metallic reflections of strands. Therefore, according to the wire rope inspection apparatus 101, it is possible to execute a wire rope analysis with higher accuracy than in the past.
  • the surface light source 130 when the surface light source 130 is provided with the diffusion plate 135, the surface light source 130 becomes a surface light source having a uniform brightness distribution. Therefore, in the luminance histogram of the photographed image, the respective luminance distributions of the wire rope region 1A and the background region (the portion where the surface light source is reflected) 130A are clearly separated. Therefore, by providing the diffusion plate 135, the stability of the extraction process of the wire rope region 1A can be improved.
  • the louver 170 is provided between the wire rope 1 and the surface light source 130, the light emitted from the surface light source 130 toward the camera 120 becomes parallel light. Therefore, the wraparound of light generated near the boundary between the shadow of the wire rope 1 and the background is suppressed. Therefore, since an image in which the contrast between the shadow and the background of the wire rope 1 is emphasized can be taken, the louver 170 is provided in the wire rope region 1A in the same manner as the effect of the configuration including the diffusion plate 135. The stability of the extraction process can be improved.
  • the surface light source 130 shown in FIG. 1 may be a monochromatic light source.
  • a monochromatic light source is useful. That is, when the camera 120 captures the wire rope 1 in a state where ambient light has hit the surface of the wire rope 1, the shadow portion of the wire rope 1 appears bright, and the shadow portion and the background portion, that is, the light portion from the light source The difference between light and dark becomes smaller. As a result, there is a possibility that the accuracy of extracting the region 1A of the wire rope 1 is lowered in the processing by the state analysis device 150.
  • the surface light source 130 by using monochromatic light having optical characteristics different from the reflected light due to disturbance light as the surface light source 130, the above-described possibility of a decrease in accuracy can be suppressed.
  • the reflected light from the wire rope 1 is rarely green light or blue light. Therefore, as the surface light source 130, monochromatic light of green light or blue light is used. Is effective.
  • the state analysis device 150 may perform the operation of extracting the region 1A of the wire rope 1 (step S12 in FIG. 4) according to the following procedure. That is, for each pixel in the frame of the captured image, the state analysis device 150 determines that the pixel is the background if the intensity of green light is sufficiently large and the intensity of red light and blue light is sufficiently small compared to the intensity of green light. On the other hand, if not, it is determined to be the region 1A of the wire rope 1. Similar to the procedure described in the first embodiment, the threshold for this determination may be automatically calculated from a histogram, or may be a predetermined fixed value.
  • the state analysis device 150 can easily identify the region 1A of the wire rope 1 and the region 130A of the surface light source 130, and extract the wire rope region 1A. To improve accuracy.
  • the image sensor of the camera 120 is a single-plate type with a Bayer pattern
  • the number of green light receiving pixels is twice that of the red light and blue light receiving pixels, and thus the sensitivity to green light is high. Therefore, in this case, it is preferable to use a green monochromatic light source as the surface light source 130.
  • the light of the surface light source 130 and the region 1A of the wire rope 1 can be photographed with high sensitivity and high resolution, and the accuracy of analysis processing in the state analysis device 150 can be improved.
  • FIG. 7 shows a configuration diagram of the wire rope inspection apparatus 103 according to the third embodiment.
  • the wire rope inspection apparatus 103 employs a configuration in which a display 180 is additionally arranged between the wire rope 1 and the surface light source 130 in the wire rope inspection apparatus 101 of the first embodiment.
  • the display 180 is installed at a position that falls within the field of view of the camera 120 and displays information related to the travel distance of the wire rope 1. This information is, for example, the number of rotations of the electric motor that drives the wire rope 1, the elapsed time from the start of rotation, and the like.
  • Other configurations are the same as those of the wire rope inspection apparatus 101, and a description thereof is omitted here.
  • FIG. 8 is a schematic diagram illustrating an example of an image captured by the camera 120 in a state where the display 180 is disposed.
  • the display 180 shows a case where the travel distance information of the wire rope 1 is displayed as a number, but the travel distance information may be displayed by a space code such as a barcode.
  • the information displayed on the display 180 and the wire rope 1 can be simultaneously photographed and recorded by the wire rope inspection device 103, so that the analysis result of the wire rope 1 and this The position in the wire rope 1 corresponding to the analysis result can be confirmed while associating later.
  • the state analysis device 150 may automatically recognize information displayed on the display 180.
  • a space code such as a bar code instead of displaying characters on the display 180 in order to facilitate the recognition process in the state analysis device 150.
  • FIG. 9 shows a case where the state analysis device 150 recognizes the travel distance information displayed on the display 180 in the video in parallel with the process of measuring the diameter of the wire rope 1 in the above-described steps S12 to S14.
  • the flow of processing of the state analysis device 150 is shown.
  • the display area extraction unit 152 (FIG. 16) of the state analysis device 150 extracts the region where the display 180 is displayed from the frame (step S22), and the travel distance information recognition unit 153 (FIG. 16) of the state analysis device 150. 16) recognizes the travel distance information displayed on the display 180 (step S23).
  • the travel distance information output unit 154 (FIG. 16) of the state analysis device 150 outputs the recognized travel distance information as data (step S24).
  • FIG. 10 illustrates a display example by the analysis result display device 160 in the wire rope inspection device 103 according to the third embodiment.
  • the recorded video display unit 161 displays the video of the read video file as described above, and display information on the display 180 is also displayed in this embodiment.
  • FIG. 10 shows an example of a screen when the recognition result of the travel distance of the wire rope 1 is displayed in synchronization with the video of the wire rope 1 in the analysis result display device 160 in the present embodiment.
  • the analysis result display device 160 is provided with a display information display unit 167 on the display 180.
  • the display unit 167 displays the travel distance information of the wire rope 1 on the recorded video display unit 161. Change the display synchronously.
  • the wire rope inspection apparatus 103 is configured in such a manner that the width information and the travel distance information of the wire rope 1 are assembled with each frame of the image of the wire rope 1. Can be output as electronic data. Therefore, the confirmation work when an abnormal measurement result is obtained can be easily and quickly performed.
  • FIG. 11 illustrates the configuration of the wire rope inspection device 104 according to the fourth embodiment of the present invention.
  • the difference from the wire rope inspection apparatus 103 in the third embodiment is that a light source 190 for irradiating light to the wire rope 1 from the camera 120 side is further provided in the vicinity of the camera 120.
  • the light source 190 is arranged such that light is also applied to the side surface portion of the wire rope 1.
  • the other configuration is the same as that of the wire rope inspection device 103, and the description thereof is omitted here.
  • FIG. 12 is a schematic diagram showing an example of an image captured by the camera 120 in the configuration of the fourth embodiment of the present invention. Since the light source 190 is provided, light is also applied to the front surface of the wire rope 1 when viewed from the camera 120, so that the surface of the wire rope 1 can be photographed by the camera 120.
  • the light source 190 emits white light and the surface light source 130 emits green light. Further, the state analysis device 150 of the wire rope inspection device 104 separates the background, that is, the green light of the surface light source 130 from the inside of the image by the same procedure as described in the second embodiment, and thereby the region of the wire rope 1. Extract 1A.
  • the state analysis device 150 of the wire rope inspection device 104 is capable of analyzing the surface of the wire rope 1.
  • a rust detection unit 156 that detects a rust region can be provided. For example, when irradiating the wire rope 1 with white light from the light source 190 and photographing the reflected light with the camera 120, the reflected light of the rust portion of the wire rope 1 has a reddish color. Therefore, by setting the range of the feature amount of the color determined to be rust in the rust detection unit 156 in advance, the rust detection unit 156 compares the range with the color of the reflected light, so that the rust detection unit 156 Extract the rust area.
  • the state analysis device 150 of the wire rope inspection device 104 can include a strand break detection unit 157 that detects the strand break of the wire rope 1.
  • FIG. 13 shows an example of an image of the wire rope 1 in which a strand break is present. In the normal wire rope 1, a regular periodic texture is obtained. On the other hand, when the strand break occurs, discontinuous points are generated as indicated by 1 c in FIG. 13. Using this, the strand break detection unit 157 analyzes the periodicity of the texture, and determines that the portion where the irregular portion is found is broken.
  • FIG. 14 shows a processing flow of the state analysis device 150 in the wire rope inspection device 104 of the fourth embodiment.
  • the rust detection unit 156 extracts the rust region in the region (step S33) and outputs the information on the rust position (step S34).
  • the strand break detection unit 157 detects the strand break in the wire rope region 1A (step S43) and outputs information on the strand break position (step S44). .
  • FIG. 15 is a diagram showing an example in which the state analysis device 150 and the analysis result display device 160 included in the wire rope inspection device 104 are configured by a general-purpose computer, and the analysis result is displayed by a program operating on the computer.
  • the position where rust is detected is rounded as shown by 11b, and the position where the broken wire is detected is highlighted by being circled as shown by 11c.
  • the ratio of the rust detection region to the entire wire rope region 1A is displayed as a line graph 165b and the broken wire detection position is displayed as a circle like 165c.
  • the ratio of the rust detection area is numerically displayed on the rust ratio display portion 168 in synchronization with the reproduction of the video.
  • the ratio of rust is the ratio of the size (number of pixels) of the rust detection region to the size (number of pixels) of the wire rope region 1A in the frame.
  • the recorded image of the wire rope 1 can be reproduced later, and the state of the surface of the wire rope 1 can be visually confirmed. Furthermore, it is possible to easily check the occurrence of rust and wire breakage of the wire rope 1 by video analysis.

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  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
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  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
PCT/JP2013/051324 2012-03-28 2013-01-23 ワイヤロープ検査装置 WO2013145823A1 (ja)

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Application Number Priority Date Filing Date Title
KR1020147025511A KR20140123593A (ko) 2012-03-28 2013-01-23 와이어 로프 검사 장치
JP2014507466A JP5769875B2 (ja) 2012-03-28 2013-01-23 ワイヤロープ検査装置
CN201380013930.4A CN104185786B (zh) 2012-03-28 2013-01-23 缆绳检查装置

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JP2012073532 2012-03-28
JP2012-073532 2012-03-28

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WO (1) WO2013145823A1 (zh)

Cited By (9)

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JP7275965B2 (ja) 2019-07-30 2023-05-18 株式会社明電舎 エレベータロープ劣化診断装置及びエレベータロープ劣化診断方法
WO2021032904A1 (en) 2019-08-16 2021-02-25 Kone Corporation Method for generating a representation of an elevator rope, a control unit and a computer program product for performing the same
EP4013711A1 (en) * 2019-08-16 2022-06-22 KONE Corporation Method for generating a representation of an elevator rope, a control unit and a computer program product for performing the same
EP4013712A4 (en) * 2019-08-16 2022-08-17 KONE Corporation ELEVATOR CABLE MONITORING DEVICE, METHOD AND COMPUTER PROGRAM PRODUCT THEREOF AND ELEVATOR EQUIPMENT
EP4013711A4 (en) * 2019-08-16 2022-08-17 KONE Corporation METHOD OF CREATING A REPRESENTATION OF AN ELEVATOR ROPE, CONTROL UNIT AND COMPUTER PROGRAM PRODUCT FOR CARRYING OUT THE METHOD
JP7422213B2 (ja) 2019-08-16 2024-01-25 コネ コーポレイション エレベータロープモニタ装置、それに対する方法およびコンピュータプログラム製品、ならびにエレベータシステム
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JP7401390B2 (ja) 2020-05-19 2023-12-19 東京製綱株式会社 非接触型金属製材検査装置および非接触型金属製材健全性診断装置
JP7376055B1 (ja) * 2023-03-01 2023-11-08 ミカサ商事株式会社 水中検査プログラム、水中検査システム、及び水中検査方法

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